In the VaYetze weekly reading (Parasha) there is a long description of the colors of the sheep and goat: Akudim, Nekutim...

What is the reason behind all of this descriptions? If the text wanted to say that G-d made miracles for Yaakov and simple created more of one kind, there was no need to be so overly descriptive. So I assume there must be some other thing that is hiding behind this description, but I was unable to find any source that gives a good explanation. Is there is one at all?